US9956909B2 - Vector-based driver assistance for towing vehicle - Google Patents
Vector-based driver assistance for towing vehicle Download PDFInfo
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- US9956909B2 US9956909B2 US15/035,506 US201415035506A US9956909B2 US 9956909 B2 US9956909 B2 US 9956909B2 US 201415035506 A US201415035506 A US 201415035506A US 9956909 B2 US9956909 B2 US 9956909B2
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- 239000013598 vector Substances 0.000 title claims abstract description 159
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 230000001133 acceleration Effects 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000000007 visual effect Effects 0.000 claims description 5
- 238000011022 operating instruction Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 description 7
- 230000006399 behavior Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/24—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions
- B60D1/30—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for sway control, e.g. stabilising or anti-fishtail devices; Sway alarm means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/58—Auxiliary devices
- B60D1/62—Auxiliary devices involving supply lines, electric circuits, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/1701—Braking or traction control means specially adapted for particular types of vehicles
- B60T8/1708—Braking or traction control means specially adapted for particular types of vehicles for lorries or tractor-trailer combinations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/24—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle inclination or change of direction, e.g. negotiating bends
- B60T8/248—Trailer sway, e.g. for preventing jackknifing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
- B60W40/105—Speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D13/00—Steering specially adapted for trailers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D13/00—Steering specially adapted for trailers
- B62D13/06—Steering specially adapted for trailers for backing a normally drawn trailer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D15/00—Steering not otherwise provided for
- B62D15/02—Steering position indicators ; Steering position determination; Steering aids
- B62D15/027—Parking aids, e.g. instruction means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/002—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles specially adapted for covering the peripheral part of the vehicle, e.g. for viewing tyres, bumpers or the like
- B60R1/003—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles specially adapted for covering the peripheral part of the vehicle, e.g. for viewing tyres, bumpers or the like for viewing trailer hitches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T2230/00—Monitoring, detecting special vehicle behaviour; Counteracting thereof
- B60T2230/06—Tractor-trailer swaying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2300/00—Indexing codes relating to the type of vehicle
- B60W2300/14—Tractor-trailers, i.e. combinations of a towing vehicle and one or more towed vehicles, e.g. caravans; Road trains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2420/00—Indexing codes relating to the type of sensors based on the principle of their operation
- B60W2420/40—Photo, light or radio wave sensitive means, e.g. infrared sensors
- B60W2420/403—Image sensing, e.g. optical camera
-
- B60W2420/42—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/14—Yaw
Definitions
- towing an object e.g., another vehicle, a trailer, a bike rack, a cargo carrier, etc.—referred to herein as a “trailer”
- trailer it is usually desirable for the trailer to track the towing vehicle (e.g., follow the same path as the towing vehicle). It can, however, be difficult for a driver to detect when undesirable and dangerous a situation—such as, for example, a jack-knife condition—is occurring or starting to occur.
- Embodiments of the present invention relate to methods and systems for assisting a driver in performing various maneuvers with a vehicle towing a trailer.
- various embodiments use vector-based monitoring techniques to detect adverse operating conditions while performing a back-up maneuver.
- some embodiments detect a jack-knife condition (i.e., when the towing/host vehicle and the trailer begin to form a V-shape) and provide a warning to the driver of the towing vehicle.
- Some embodiments of the invention provide methods and systems for using towing vehicle and towed trailer vectors to inform a driver of relative movement between the vehicle and the trailer.
- the vectors are determined based on monitored information such as, for example, the towing vehicle's steering wheel angle, movement data (e.g., position, velocity, acceleration, yaw, etc.), and camera image data.
- the vectors are used to inform the driver when the towing vehicle and the trailer are traveling along the same curve, when the trailer is traveling straight, how to steer the towing vehicle to achieve a desired trailer trajectory, and when a jackknife condition is imminent.
- the vectors can be used to assist the driver in performing back-up maneuvers.
- the invention provides a driver-assistance system for a host vehicle towing a trailer.
- the system includes a processor and a memory that stores instructions that are executed by the processor to provide system functionality.
- the system determines a velocity vector for the host vehicle at a location near a rear of the host vehicle at a defined lateral distance from a trailer hitch installed on the host vehicle.
- the system also determines a velocity vector for the trailer at a corresponding location on the trailer—that is a location on the front of the trailer at approximately the same defined lateral distance from the trailer hitch.
- the system compares the velocity vector for the host vehicle to the velocity vector for the trailer and determines, based on the comparison, whether a jack-knife condition is likely to occur. If a jack-knife condition is likely to occur, the system generates a warning signal.
- the invention provides a method of monitoring a trailer.
- a velocity vector for the host vehicle is determined at a location near a rear of the host vehicle at a defined lateral distance from a trailer hitch installed on the host vehicle.
- a velocity vector for the trailer is also determined at a corresponding location on the trailer—that is a location on the front of the trailer at approximately the same defined lateral distance from the trailer hitch.
- the velocity vector for the host vehicle is compared to the velocity vector for the trailer and, based on the comparison, a potential jack-knife condition is detected. When the potential jack-knife condition is detected, a warning signal is generated.
- the invention provides another method for monitoring a trailer.
- a velocity vector for the host vehicle at a location near a rear of the host vehicle at a defined lateral distance from a trailer hitch installed on the host vehicle is determined.
- a hitch vector for the host vehicle at a location of the trailer hitch is also determined. Due to the mechanical coupling between the host vehicle and the trailer at the trailer hitch, a hitch vector for the trailer is substantially similar to the hitch vector for the host vehicle and can be determined based on the hitch vector for the host vehicle.
- a trailer angle of the trailer is determined based on image data captured by a rear-facing camera positioned on the host vehicle and a velocity vector is determined for the trailer at a location near a front of the trailer at the defined lateral distance from the trailer hitch.
- the velocity vector for the trailer is determined based at least in part on the hitch vector for the trailer and the determined trailer angle.
- the velocity vector for the host vehicle is compared to the velocity vector for the trailer and an output signal is generated indicative of movement of the trailer relative to the host vehicle based on the comparison.
- FIG. 1 is an overhead view of a towing vehicle and a trailer illustrating various vectors of the towing vehicle and the trailer.
- FIG. 2 is an overhead view of a towing vehicle and a trailer traveling along the same curve.
- FIG. 3 is a schematic diagram of a driver assistance system according, to one embodiment.
- FIG. 4 is a flowchart of a method for monitoring a trailer implemented by the system of FIG. 3 .
- control units and “controllers” described in the specification can include standard processing components, such as one or more processors, one or more memory modules including non-transitory computer-readable medium, one or more input/output interfaces, and various connections (e.g., a system bus) connecting the components.
- FIG. 1 shows a towing vehicle 101 coupled to a trailer 103 at a trailer hitch 105 performing a maneuver in reverse.
- the behavior of the host vehicle 101 can be described in terms of a variety of vectors each positioned at (i.e., originating from or associated with) different points on the host vehicle 101 . For example, as shown in FIG.
- These vectors can be determined based on observed vehicle operating parameters such as, for example, acceleration information, velocity information, and steering angle information. This information can be determined by a sensor mounted on the vehicle or a camera 113 positioned to capture image data.
- a system (such as described in further detail below) is configured to determine a first vector 107 and a second vector 109 based on measured/observed vehicle data, then the third vector 111 can be determined based on the first vector 107 and the second vector 109 .
- the host vehicle 101 of FIG. 1 is also equipped to determine various vectors that characterize the movement of the trailer 103 .
- the hitch vector 109 of the host vehicle is generally the same as the hitch vector of the trailer.
- the host vehicle 101 in the example of FIG. 1 is equipped with a rear-facing camera 113 configured to monitor the position and orientation of the trailer 103 relative to the host vehicle 101 . Based on this information, the trailer angle ( ⁇ ) of the trailer can be determined and another trailer vector 115 can be determined.
- two vectors 109 , 115 can be used to determine other vectors that characterize the movement of the trailer 103 .
- a second trailer vector 117 can be determined at the rear end of the trailer 103 . This information may be useful because trailer sway is most prominent at the rear of the trailer.
- another vector 119 can be determined at a location on the front of the trailer.
- this trailer vector 119 is a velocity vector (V T ) positioned at a first defined linear distance from the trailer hitch 105 .
- the trailer velocity vector V T corresponds to a host vehicle velocity vector (V V ) that is positioned at a corresponding location on the host vehicle. More specifically, the host vehicle velocity vector V V is positioned at the same linear distance from the trailer hitch 105 (i.e., vector 111 ).
- the systems and methods described below compare the trailer velocity vector V T to the host vehicle velocity vector V V to characterize movement of the trailer 103 relative to the host vehicle 101 .
- the host vehicle 101 and the trailer 103 are moving uniformly along a constant curve.
- the host vehicle velocity vector V V and the trailer velocity vector V T are substantially the same (i.e., nearly identical).
- the difference between the host vehicle velocity vector V V and the trailer velocity vector V T remains constant. This identity between the two velocity vectors is also present when the vehicle and the trailer are moving in a straight line (either forward or in reverse).
- the trailer 103 when the host vehicle 101 is operating in reverse, the trailer 103 often does not follow the same path as the host vehicle 101 . In some cases, this reverse movement results in a jack-knife scenario where the host vehicle 101 and the trailer 103 form a V-shape. Extreme cases of trailer jack-knife can cause damage to the trailer 103 , the host vehicle 101 , and the trailer hitch coupling 105 .
- the host vehicle velocity vector V V and the trailer velocity vector V T When a jack-knife scenario is occurring or is about to occur, the host vehicle velocity vector V V and the trailer velocity vector V T will no longer be the same nor will the difference remain constant.
- the systems and methods described herein monitor the difference between the host vehicle velocity vector V V and the trailer velocity vector V T to detect such jack-knife scenarios and to provide a warning to the driver of the vehicle before damage is caused.
- FIG. 3 illustrates a system 300 for determine and monitoring various vectors of the host vehicle 101 and the trailer 103 .
- a controller 301 includes a processor and a memory. The memory stores instructions that are executed by the processor to provide the functionality of the system 300 such as described herein.
- the controller 301 receives input data indicative of observed and measured vehicle parameters from various sensors including, for example, an acceleration sensor 303 , a velocity sensor 305 , and a camera 309 .
- the controller 301 analyzes the input data, determines/monitors the relevant vectors, and provides an output signal to a user output device 311 .
- this user output device 311 can include, for example, a speaker to provide an audible output, a visual display (LCD, LED, warning light, etc.) to provide a visual output, or a vibratory mechanism to provide haptic feedback.
- a speaker to provide an audible output
- a visual display LCD, LED, warning light, etc.
- a vibratory mechanism to provide haptic feedback.
- the controller 301 includes one or more processing units (e.g., a processor, an application specific integrated circuit (“ASIC”), etc.), non-transitory computer-readable medium, and at least one input/output interface.
- the controller obtains vehicle operating parameters through an input/output interface.
- these external devices are connected to the input/output interface over a dedicated wired connection or communicate with the input/output interface over a controller-area-network communication bus (e.g., a CAN bus).
- a controller-area-network communication bus e.g., a CAN bus
- FIG. 4 illustrates a method implemented by the controller 301 to determine and monitor the various vectors associated with the host vehicle 101 and the trailer 103 .
- the controller 301 calculates a vector 109 for the vehicle's hitch (step 401 ).
- the trailer hitch vector 109 can be determined directly based on measured sensor data or indirectly based on two other calculated vehicle vectors.
- the controller 301 also determines a center vehicle vector 107 based either on measured sensor data, or two other calculated vehicle vectors (step 403 ). Based on two previously calculated vehicle vectors (e.g., the center vehicle vector 107 and the hitch vector 109 ), the controller 301 determines the rear vehicle velocity vector V V (step 405 ).
- the controller 301 also determines the trailer angle ( ⁇ ) based on data from the rear-facing camera 113 (step 407 ) and determines a center trailer vector 115 based on the trailer angle ( ⁇ ) (step 409 ). Using the center trailer vector 115 and the hitch vector 109 , the controller 301 is able to determine the front trailer velocity vector V T (step 411 ).
- the controller 301 compares the vehicle velocity vector (Vv) and the trailer yam vector (VT). If a difference between these vectors is approximately zero (or between zero and a predetermined minimum threshold) (step 413 ), the controller concludes that the trailer is tracking behind the towing vehicle (e.g., in a straight path or a curved path) (step 415 ). If the difference between the vectors is greater than a threshold (step 417 ), the controller 301 concludes that a jack-knife condition is either occurring or is imminent (step 419 ) and generates a warning, signal that is transmitted to the user output device 311 . As discussed above, the user output device can be configured to provide a visual alert, an audible alert, a haptic alert, or a combination thereof.
- the controller 301 generates a preliminary warning signal (step 421 ) when the host vehicle velocity vector V V is not the same as the trailer velocity vector V T , but the difference does not yet exceed the threshold.
- this determination is used to provide a continuous signal to the user output device 311 based on the detected relative movement between the vehicle and the trailer (or the lack thereof).
- the controller 301 can use the difference to inform the driver when the towing vehicle and the trailer are traveling along the same curve, when the trailer is traveling straight, and when a jackknife condition is imminent.
- the controller 301 is configured to determine other vectors for other points of the vehicle 101 and the trailer 103 than those described above and illustrated in the method of FIG. 4 .
- the controller 301 determines at least one vector for a point along the rear of the trailer (vector 117 in FIG. 1 ).
- the controller 301 can be configured to calculate a vector for the rear of the trailer and use this vector to identify imminent jackknife conditions.
- the vectors calculated by the controller 301 can also be used to instruct a driver how to steer the towing vehicle to achieve a desired trailer trajectory.
- the controller can be configured to output instructions for the driver (e.g., visual or audible instructions) that instruct the driver how to steer the vehicle (e.g., left or right or clockwise or counterclockwise) to change the trailer trajectory to a desired trajectory.
- the desired trajectory can be a straight trajectory (with reference to the vehicle trajectory).
- the desired trajectory may be a non-straight trajectory (with reference to the vehicle trajectory).
- the driver may be backing-up the vehicle and the trailer and may desire that the trailer follow a different path than the vehicle (e.g., to position the trailer in a parking space).
- the controller can be configured to automatically identify a likely position for the trailer when the vehicle is backed up (e.g., using image data and line recognition). Alternatively or in addition, the controller can be configured to allow the driver to manually specify a projected trajectory for the trailer (e.g., through a touchscreen, buttons, or other input mechanisms). For example, a driver can specify that he or she desires to back the trailer into a parking space located perpendicular to the vehicle on either the right or the left of the vehicle. After receiving the desired trajectory, the controller generates and outputs instructions to the driver. The instructions instruct the driver how to turn the steering wheel to move the trailer along the desired trajectory.
- controller can be configured to receive vehicle operating parameters from various devices including devices other than those described herein. Also, in some embodiments, the controller can be configured to receive operating parameters from the trailer through a wired or wireless connection (e.g., trailer velocity, steering angle, acceleration, yaw rate, etc.). It should also be understood that the functionality described above can be distributed among multiple controllers.
- the invention provides, among other things, a system for determining and monitoring a variety of vectors indicative of movement characteristics of a host vehicle and a trailer and providing driver assistance information based on a comparison of at least one vehicle vector and at least one trailer vector.
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Abstract
Description
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US15/035,506 US9956909B2 (en) | 2013-11-18 | 2014-11-18 | Vector-based driver assistance for towing vehicle |
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US201361905677P | 2013-11-18 | 2013-11-18 | |
PCT/US2014/066096 WO2015074027A1 (en) | 2013-11-18 | 2014-11-18 | Vector-based driver assistance for towing vehicle |
US15/035,506 US9956909B2 (en) | 2013-11-18 | 2014-11-18 | Vector-based driver assistance for towing vehicle |
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US9956909B2 true US9956909B2 (en) | 2018-05-01 |
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DE112014004384T5 (en) | 2016-06-09 |
JP6231210B2 (en) | 2017-11-15 |
CN105829178B (en) | 2018-06-15 |
US20160264046A1 (en) | 2016-09-15 |
JP2017502867A (en) | 2017-01-26 |
CN105829178A (en) | 2016-08-03 |
WO2015074027A1 (en) | 2015-05-21 |
DE112014004384B4 (en) | 2024-01-11 |
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